Preparation method of high-softening-point asphalt particles for drilling fluid

A technology of high softening point bitumen and drilling fluid, which is applied in chemical instruments and methods, chemically processing tar pitch/petroleum pitch/natural pitch, drilling compositions, etc., can solve the problem of low reaction efficiency, long reaction time, The problem of high temperature sensitivity of the product can achieve the effects of high reaction efficiency, convenient operation, excellent high temperature performance and temperature resistance performance.

Active Publication Date: 2014-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Aiming at the problems of long reaction time, low reaction efficiency and high temperature sensitivity of the product in the process of producing high softening point asphalt in the prior art, the pres

Method used

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  • Preparation method of high-softening-point asphalt particles for drilling fluid
  • Preparation method of high-softening-point asphalt particles for drilling fluid
  • Preparation method of high-softening-point asphalt particles for drilling fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Heat the vacuum residue with a penetration of 116 1 / 10mm at 25°C and a softening point of 41.5°C, accounting for 96.2% (m) of the total amount, to a molten state at 150°C, and add 1.2% (m) of ferric chloride And 2.6% (m) of polyphosphoric acid and pass into the air, the flow rate is 0.1m 3 kg -1 h -1 , use a high-shear mixing emulsifier to shear for 30 minutes, and enter the oxidation tower for blowing oxidation to obtain high softening point asphalt products.

[0035] Put 100g of high softening point asphalt in a closed container, add 1.0 times of light naphtha as a solvent, heat to 190°C, feed nitrogen to control the pressure of the container at 8.5MPa, and keep it for 30min. The mixture is put into a separator through a throttle valve to obtain high softening point bitumen granules.

Embodiment 2

[0037] Heat the vacuum residue with a penetration of 1711 / 10mm at 25°C and a softening point of 37.2°C, accounting for 95.4% (m) of the total amount, to a molten state of 140°C, and add 0.8% (m) of zinc oxide, 0.8 % (m) of copper sulfide and 3.0% (m) of polyphosphoric acid and pass into the air, the flow rate is 0.1m 3 kg -1 h -1 , use a high-shear mixing emulsifier to cut for 30 minutes, and enter the oxidation tower for blowing oxidation to obtain high softening point asphalt.

[0038] Put 100g of high softening point asphalt in a closed container and add 0.6 times of mixed solvent, wherein n-butane accounts for 70% and isobutane accounts for 30%. Heat to 160°C, feed nitrogen to control the pressure of the container at 6.0MPa, and keep it for 25min. The mixture is put into a separator through a throttle valve to obtain high softening point bitumen granules.

Embodiment 3

[0040] Heat the vacuum residue with a penetration of 1481 / 10mm at 25°C and a softening point of 39.5°C, accounting for 95.4% (m) of the total amount, to a molten state at 150°C, and add 0.8% (m) of ferric chloride, 0.6% (m) of zinc oxide and 3.2% (m) of polyphosphoric acid are fed into the air with a flow rate of 0.2m 3 kg -1 h -1 , use a high-shear mixing emulsifier to cut for 30 minutes, and enter the oxidation tower for blowing oxidation to obtain high softening point asphalt.

[0041] Put 100g of high softening point asphalt in a closed container and add 0.8 times of mixed solvent, wherein n-butane accounts for 40%, and isopentane accounts for 60%. Heat to 170°C, pass nitrogen gas to control the pressure of the container at 7.0MPa, and keep it for 25min. The mixture is put into a separator through a throttle valve to obtain high softening point bitumen granules.

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Abstract

The invention provides a preparation method of high-softening-point asphalt particles for drilling fluid. The preparation method comprises the following steps of: (1) preparing high-softening-point asphalt; and (2) placing the high-softening-point asphalt in a closed container, heating to 80-190 DEG C, adding a solvent for dissolution, mixing uniformly, introducing inert gas to regulate the pressure of the closed container to be 3.0-10.0MPa, stabilizing for 10-80min, then feeding into a separator through a throttling valve to form asphalt particles, and recovering the solvent in a gaseous-state form. According to the invention, the problem that the high-softening-point asphalt is difficult to smash into fine particles is solved. The asphalt particles can be widely applied to deep oil gas well drilling operation processes to serve as an important constituent part of the drilling fluid and play the roles in preventing collapse, stopping leakage, reducing filter loss and the like.

Description

technical field [0001] The invention relates to a preparation method of high softening point asphalt granules, in particular to a preparation method of high softening point asphalt granules for drilling fluid. Background technique [0002] High softening point asphalt refers to asphalt with a softening point above 100°C, especially above 120°C. High softening point asphalt is widely used because of its excellent high temperature resistance. If it is used as a roof covering for building a house, it will not become very soft or even runny even in the hot summer. It can also be used in drilling operations in deep oil and gas fields. As an important part of drilling fluid, it can play a role in plugging, preventing collapse, stabilizing the well wall and reducing rate loss under high temperature conditions. In addition, it can also be used as a modification additive for polymer materials, etc. [0003] Asphalt products are widely used in oil and gas drilling, and can be used ...

Claims

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Application Information

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IPC IPC(8): C10C3/04C10C3/14C09K8/035
Inventor 傅丽宁爱民郭皎河刘树华
Owner CHINA PETROLEUM & CHEM CORP
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